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GCC-3020 Rectangular Continuously Variable Metallic Neutral Density Filters

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GCC-3020 Metallic Linearly Variable Neutral Density Filters

This ND filters provides linearly varying attenuation or beamsplitting in the visible and near infrared region. The optical density varies linearly across the length.Attenuation is achieved by a thin film of Ni-Cr-Fe protected with an overcoat of SiO. The rear surface is broadband AR coated for the visible region.

•Material: BK7 fine annealed

•Dimension Tolerance: +0.0/-0.2

•Clear Aperture: 90% of length and 80% of width

•Optical Density(OD): 0.8-2.0±5%@632.8nm

•Linearity of Optical Density: ±5%

•Coating: S1:Ni-Cr-Fe

S2:Broadband AR coated, R_ave<0.5% for 420-675nm at 0-15º incidence.